CVE-2026-9793

HIGHNVD 7.55.9▼
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-05-28. NVD baseline CVSS 7.5; sources differ by 1.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims, leading to a compromise of data integrity within the OpenID Connect (OIDC) authorization flow. While a redirect URI allowlist acts as a compensating control, this vulnerability violates OIDC Core and Financial-grade API (FAPI) signing requirements.

CVSS v3
7.5
EG Score
5.9(medium)
EPSS
2.1%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 3, 2026

Advisory Details (2)

Auto-updated Jun 10, 2026
Patch available. Sources: redhat.
redhat

2482460 – (CVE-2026-9793) CVE-2026-9793 keycloak: Keycloak: Security policy bypass in JWE-encrypted request object processing

https://bugzilla.redhat.com/show_bug.cgi?id=2482460
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-9793

Vendor Advisories for CVE-2026-9793(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
mavenorg.keycloak:keycloak-services—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-18 10:04 UTCEPSS rescore
  6. 2026-07-16 17:03 UTCEPSS rescore
  7. 2026-07-15 16:57 UTCEPSS rescore
  8. 2026-07-13 22:31 UTCEPSS rescore
  9. 2026-07-13 06:13 UTCEPSS rescore
  10. 2026-07-11 22:34 UTCGHSA enrichment
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-09 19:10 UTCEPSS rescore
  13. 2026-07-08 22:49 UTCGHSA enrichment
  14. 2026-07-08 15:16 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-02 17:02 UTCEPSS rescore
  18. 2026-07-02 14:42 UTCGHSA enrichment
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 03:44 UTCGHSA enrichment
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-29 19:45 UTCGHSA enrichment
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-28 20:35 UTCGHSA enrichment
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 54 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-27 21:15 UTCGHSA enrichment
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-26 22:00 UTCGHSA enrichment
  5. 2026-06-25 22:52 UTCGHSA enrichment
  6. 2026-06-25 13:50 UTCEPSS rescore
  7. 2026-06-24 23:04 UTCGHSA enrichment
  8. 2026-06-24 14:05 UTCEPSS rescore
  9. 2026-06-23 21:33 UTCEPSS rescore
  10. 2026-06-22 14:25 UTCEPSS rescore
  11. 2026-06-21 14:56 UTCEPSS rescore
  12. 2026-06-21 01:59 UTCEPSS rescore
  13. 2026-06-19 19:26 UTCEPSS rescore
  14. 2026-06-18 17:52 UTCEPSS rescore
  15. 2026-06-17 17:53 UTCEPSS rescore
  16. 2026-06-17 14:57 UTCGHSA enrichment
  17. 2026-06-16 17:53 UTCEPSS rescore
  18. 2026-06-16 15:50 UTCGHSA enrichment
  19. 2026-06-15 17:49 UTCEPSS rescore
  20. 2026-06-15 13:14 UTCGHSA enrichment
  21. 2026-06-14 23:18 UTCEPSS rescore
  22. 2026-06-14 13:56 UTCGHSA enrichment
  23. 2026-06-13 14:46 UTCGHSA enrichment
  24. 2026-06-12 23:12 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
  26. 2026-06-12 15:38 UTCGHSA enrichment
  27. 2026-06-11 16:30 UTCGHSA enrichment
  28. 2026-06-11 14:00 UTCEPSS rescore
  29. 2026-06-10 16:58 UTCGHSA enrichment
  30. 2026-06-10 13:22 UTCEPSS rescore
  31. 2026-06-09 17:51 UTCGHSA enrichment
  32. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  33. 2026-06-08 18:44 UTCGHSA enrichment
  34. 2026-06-08 14:17 UTCEPSS rescore
  35. 2026-06-07 19:08 UTCGHSA enrichment
  36. 2026-06-07 15:25 UTCEPSS rescore
  37. 2026-06-06 20:00 UTCGHSA enrichment
  38. 2026-06-06 13:47 UTCEPSS rescore
  39. 2026-06-05 22:47 UTCEPSS rescore
  40. 2026-06-05 20:53 UTCGHSA enrichment
  41. 2026-06-05 06:10 UTCEPSS rescore
  42. 2026-06-04 21:46 UTCGHSA enrichment
  43. 2026-06-04 13:12 UTCEPSS rescore
  44. 2026-06-03 22:39 UTCGHSA enrichment
  45. 2026-06-02 23:31 UTCGHSA enrichment
  46. 2026-06-02 20:13 UTCEPSS rescore
  47. 2026-06-02 00:24 UTCGHSA enrichment
  48. 2026-06-01 13:52 UTCEPSS rescore
  49. 2026-06-01 01:17 UTCGHSA enrichment
  50. 2026-05-31 22:30 UTCEPSS rescore
  51. 2026-05-31 00:16 UTCEPSS rescore
  52. 2026-05-29 13:44 UTCEPSS rescore
  53. 2026-05-28 13:44 UTCEPSS rescore
  54. 2026-05-28 04:38 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-9793?
CVE-2026-9793 is a high vulnerability published on May 28, 2026. A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims,…
When was CVE-2026-9793 disclosed?
CVE-2026-9793 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on June 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9793 actively exploited?
CVE-2026-9793 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9793?
CVE-2026-9793 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.9.
How do I remediate CVE-2026-9793?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9793, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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